User`s manual

P-660R-F1 Support Notes

This will create the second route in the enif0:0 interface.

IP Alias 2

Active it and enter the third LAN IP address for the P-660R-F1. This

will create the third route in the enif0:1 interface.

10. Using IP Policy Routing

 What is IP Policy Routing (IPPR)?



Traditionally, routing is based on the destination address only and the router

takes the shortest path to forward a packet. IP Policy Routing (IPPR) provides a

mechanism to override the default routing behavior and alter the packet

forwarding based on the policy defined by the network administrator.

Policy-based routing is applied to incoming packets on a per interface basis, prior

to the normal routing. Network administrators can use IPPR to distribute traffic

among multiple paths. For example, if a network has both the Internet and

remote node connections, we can route the Web packets to the Internet using

one policy and route the FTP packets to the remote LAN using another policy.

See the figure below.

Use IPPR to distribute traffic among multiple paths

 Benefits



Source-Based Routing - Network administrators can use policy-based routing

to direct traffic from different users through different connections.

Quality of Service (QoS)- Organizations can differentiate traffic by setting the

precedence or TOS (Type of Service) values in the IP header at the periphery of

the network to enable the backbone to prioritize traffic.

Cost Savings- IPPR allows organizations to distribute interactive traffic on

high-bandwidth, high-cost path while using low-path for batch traffic.

Load Sharing- Network administrators can use IPPR to distribute traffic among

multiple paths.

 How does the IPPR work?



A policy defines the matching criteria and the action to take when a packet meets

the criteria. The action is taken only when all the criteria are met. The criteria

include the source address and port, IP protocol (ICMP, UDP, TCP,etc),